<SEC-DOCUMENT>0001315257-25-000015-index.html : 20251217
<SEC-HEADER>0001315257-25-000015.hdr.sgml : 20251217
<ACCEPTANCE-DATETIME>20251217170526
ACCESSION NUMBER:		0001315257-25-000015
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20251216
FILED AS OF DATE:		20251217
DATE AS OF CHANGE:		20251217

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WILKERSON SONJA MICHELLE
		CENTRAL INDEX KEY:			0001245155
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32737
		FILM NUMBER:		251580084

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Koppers Holdings Inc.
		CENTRAL INDEX KEY:			0001315257
		STANDARD INDUSTRIAL CLASSIFICATION:	LUMBER & WOOD PRODUCTS (NO FURNITURE) [2400]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				201878963
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		436 SEVENTH AVENUE
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15219
		BUSINESS PHONE:		412-227-2001

	MAIL ADDRESS:	
		STREET 1:		436 SEVENTH AVENUE
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15219

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KI Holdings Inc.
		DATE OF NAME CHANGE:	20050124
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wk-form4_1766009124.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wk-form4_1766009124.html

Document 1 - RAW XML: wk-form4_1766009124.xml

</DOCUMENT>
</SEC-DOCUMENT>